Composite materials including high modulus polyolefin fibers...

D - Textiles – Paper – 04 – H

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D04H 3/00 (2006.01) B32B 5/22 (2006.01) B32B 5/24 (2006.01) B32B 5/26 (2006.01) B32B 27/12 (2006.01) B32B 27/32 (2006.01) D04H 5/00 (2006.01)

Patent

CA 2619172

Disclosed are composite laminates that can exhibit high strength and/or low dielectric loss and can also be lightweight. The laminates include layers formed of high modulus polyolefin fiber. The fibers can be woven or knit to form a fabric or can be included in a nonwoven fabric that can be one or more layers of the composite structures. The layers including the high modulus polyolefin fibers can include other fibers, such as fiberglass. The composites can also include layers of other materials, for instance layers formed of polyaramids, fiberglass, or carbon fiber wovens or nonwovens. The composites can advantageously be utilized in low loss dielectric applications, such as in forming circuit board substrates, or in applications beneficially combining strength with low weight, such as automobile and boat materials.

L~invention concerne des laminés composites qui peuvent présenter une résistance élevée et/ou une faible perte diélectrique et peuvent également être légers. Lesdits laminés comprennent des couches formées de fibre polyoléfine à module élevé. Les fibres peuvent être tissées ou tricotées de manière à former un tissu ou elles peuvent être incluses dans un tissu non tissé qui peut être une ou plusieurs couches des structures de composite. Les couches comprenant les fibres polyoléfines à module élevé peuvent inclure d~autres fibres, notamment de la fibre de verre. Les composites peuvent également comprendre des couches d~autres matériaux, par exemple des couches formées de tissés ou de non-tissés en polyaramide, fibre de verre ou fibre de carbone On peut avantageusement utiliser lesdits composites dans des applications diélectriques à faible perte, notamment dans la formation de substrats de cartes électroniques, ou dans des applications combinant avantageusement résistance et faible poids, notamment des matériaux pour automobile ou bateau.

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